It’s impossible to know what side effects you may experience until you get vaccinated the Covid-19, but symptoms typically disappear within a few days.

How long do side effects of Covid-19 vaccines last?

The common side effects are much less serious than developing coronavirus or complications associated with coronavirus and they usually go away within a few days.

If you feel uncomfortable, take paracetamol. Make sure you take paracetamol as directed on the label or leaflet.

An uncommon side effect is swollen glands in the armpit or neck, on the same side as the arm where you had the vaccine. This can last for around 10 days, but if it lasts longer see your doctor.

For the Johnson & Johnson vaccine, the people who experienced the side effect were women between the ages of 18 and 48. They noticed symptoms between 6 and 13 days after they were vaccinated.

What are common side effects of COVID-19 vaccines?

Of the three COVID-19 vaccines that have been available within the U.S., two are mRNA vaccines (Pfizer and Moderna), and one is an inactivated viral vector vaccine (Johnson & Johnson).

People who receive (or have received) any of these vaccines may experience common side effects such as:

  • pain at the injection site
  • swelling in the arm that received the injection
  • redness at the injection site
  • feeling tired or fatigued
  • headaches
  • muscle pain or achiness
  • fever
  • chills
  • nausea
  • “COVID arm” – a harmless red rash that appears, on rare occasions, at the injection site about a week after the injection (this can be associated with the Moderna mRNA vaccine)

What can I do to relieve the discomfort of COVID-19 vaccine side effects?

Depending on your symptoms, you may try:

  • putting a cold compress (such as a damp washcloth) on the injection site
  • using your arm, rather than keeping it inactive, to reduce injection site discomfort
  • checking with your doctor to see if you can take over-the-counter painkillers
  • drinking lots of fluids
  • wearing lighter clothing, if you’re feeling feverish

Do you get more side effects from the second Covid vaccine?

Mild side effects are common after getting vaccinated against COVID-19, but for people who receive two-dose regimens, stronger symptoms are more commonly experienced after the second shot. Side effects may include a headache, fatigue, achiness, fever and nausea.

How long will my arm hurt after COVID-19 vaccine?

This form of inflammatory response explains the aches and pains after receiving the first jab, said Dr Tseng, and this usually lasts for only a few hours or days. It is the adaptive immune response – the second layer of immune defence – that takes days or weeks to develop (More detail)

What are the mild-to-moderate side effects of the COVID-19 vaccine?

Mild-to-moderate side effects, like a low-grade fever or muscle aches, are normal and not a cause for alarm: they are signs that the body’s immune system is responding to the vaccine, specifically the antigen (a substance that triggers an immune response), and is gearing up to fight the virus. (More detail)

Side effects of the Pfizer/BioNTech vaccine

A full list of common side effects of the Pfizer/BioNTech vaccine is available on GOV.UK.

Information for UK recipients on Pfizer/BioNTech COVID-19 vaccine

Side effects of the Oxford/AstraZeneca vaccine

A full list of common side effects of the Oxford/AstraZeneca vaccine is available on GOV.UK.

Information for UK recipients on Oxford/AstraZeneca COVID-19 vaccine

Side effects of the Moderna vaccine

A full list of common side effects of the Moderna vaccine is available on GOV.UK.

Information for UK recipients on Moderna COVID-19 vaccine

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